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'use strict';
const common = require('../common');
const assert = require('assert');
const net = require('net');
const message = Buffer.from('hello world');
// Test typical usage
net.createServer(common.mustCall(function(socket) {
this.close();
socket.end(message);
})).listen(0, function() {
let received = 0;
const buffers = [];
const sockBuf = Buffer.alloc(8);
net.connect({
port: this.address().port,
onread: {
buffer: sockBuf,
callback: function(nread, buf) {
assert.strictEqual(buf, sockBuf);
received += nread;
buffers.push(Buffer.from(buf.slice(0, nread)));
}
}
}).on('data', common.mustNotCall()).on('end', common.mustCall(() => {
assert.strictEqual(received, message.length);
assert.deepStrictEqual(Buffer.concat(buffers), message);
}));
});
// Test Uint8Array support
net.createServer(common.mustCall(function(socket) {
this.close();
socket.end(message);
})).listen(0, function() {
let received = 0;
let incoming = new Uint8Array(0);
const sockBuf = new Uint8Array(8);
net.connect({
port: this.address().port,
onread: {
buffer: sockBuf,
callback: function(nread, buf) {
assert.strictEqual(buf, sockBuf);
received += nread;
const newIncoming = new Uint8Array(incoming.length + nread);
newIncoming.set(incoming);
newIncoming.set(buf.slice(0, nread), incoming.length);
incoming = newIncoming;
}
}
}).on('data', common.mustNotCall()).on('end', common.mustCall(() => {
assert.strictEqual(received, message.length);
assert.deepStrictEqual(incoming, new Uint8Array(message));
}));
});
// Test Buffer callback usage
net.createServer(common.mustCall(function(socket) {
this.close();
socket.end(message);
})).listen(0, function() {
let received = 0;
const incoming = [];
const bufPool = [ Buffer.alloc(2), Buffer.alloc(2), Buffer.alloc(2) ];
let bufPoolIdx = -1;
let bufPoolUsage = 0;
net.connect({
port: this.address().port,
onread: {
buffer: () => {
++bufPoolUsage;
bufPoolIdx = (bufPoolIdx + 1) % bufPool.length;
return bufPool[bufPoolIdx];
},
callback: function(nread, buf) {
assert.strictEqual(buf, bufPool[bufPoolIdx]);
received += nread;
incoming.push(Buffer.from(buf.slice(0, nread)));
}
}
}).on('data', common.mustNotCall()).on('end', common.mustCall(() => {
assert.strictEqual(received, message.length);
assert.deepStrictEqual(Buffer.concat(incoming), message);
assert.strictEqual(bufPoolUsage, 7);
}));
});
// Test Uint8Array callback support
net.createServer(common.mustCall(function(socket) {
this.close();
socket.end(message);
})).listen(0, function() {
let received = 0;
let incoming = new Uint8Array(0);
const bufPool = [ new Uint8Array(2), new Uint8Array(2), new Uint8Array(2) ];
let bufPoolIdx = -1;
let bufPoolUsage = 0;
net.connect({
port: this.address().port,
onread: {
buffer: () => {
++bufPoolUsage;
bufPoolIdx = (bufPoolIdx + 1) % bufPool.length;
return bufPool[bufPoolIdx];
},
callback: function(nread, buf) {
assert.strictEqual(buf, bufPool[bufPoolIdx]);
received += nread;
const newIncoming = new Uint8Array(incoming.length + nread);
newIncoming.set(incoming);
newIncoming.set(buf.slice(0, nread), incoming.length);
incoming = newIncoming;
}
}
}).on('data', common.mustNotCall()).on('end', common.mustCall(() => {
assert.strictEqual(received, message.length);
assert.deepStrictEqual(incoming, new Uint8Array(message));
assert.strictEqual(bufPoolUsage, 7);
}));
});
// Test explicit socket pause
net.createServer(common.mustCall(function(socket) {
this.close();
socket.end(message);
})).listen(0, function() {
let received = 0;
const buffers = [];
const sockBuf = Buffer.alloc(8);
let paused = false;
net.connect({
port: this.address().port,
onread: {
buffer: sockBuf,
callback: function(nread, buf) {
assert.strictEqual(paused, false);
assert.strictEqual(buf, sockBuf);
received += nread;
buffers.push(Buffer.from(buf.slice(0, nread)));
paused = true;
this.pause();
setTimeout(() => {
paused = false;
this.resume();
}, 100);
}
}
}).on('data', common.mustNotCall()).on('end', common.mustCall(() => {
assert.strictEqual(received, message.length);
assert.deepStrictEqual(Buffer.concat(buffers), message);
}));
});
// Test implicit socket pause
net.createServer(common.mustCall(function(socket) {
this.close();
socket.end(message);
})).listen(0, function() {
let received = 0;
const buffers = [];
const sockBuf = Buffer.alloc(8);
let paused = false;
net.connect({
port: this.address().port,
onread: {
buffer: sockBuf,
callback: function(nread, buf) {
assert.strictEqual(paused, false);
assert.strictEqual(buf, sockBuf);
received += nread;
buffers.push(Buffer.from(buf.slice(0, nread)));
paused = true;
setTimeout(() => {
paused = false;
this.resume();
}, 100);
return false;
}
}
}).on('data', common.mustNotCall()).on('end', common.mustCall(() => {
assert.strictEqual(received, message.length);
assert.deepStrictEqual(Buffer.concat(buffers), message);
}));
});
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